S T E I N W A Y  &  S O N S

STEINWAY PIANO SPECIFICATIONS & SERIAL NUMBER DATA
U.S.A. MANUFACTURE

Square Grand Pianos

SERIAL NUMBERS DATES OF MANUFACTURE

First One # 483

Made in 1853
     Last One # 62,871

Made in 1888

Grand Pianos

MODEL

SERIAL NUMBERS DATES OF MANUFACTURE ACTUAL SIZE NUMBER OF KEYS
Model D

First One # 791

Made In 1856-1859 8' 3" 7 Octaves
Old Style 4

First One # 2522

1859-1864 8' 5" 7 Octaves
    1869-1878 8' 6" 7 & 1/3
    1876-1884 8' 9" 7 & 1/3
    1884-1913 8' 10" 7 & 1/3
    1914-1966 8' 11 & 1/4" 7 & 1/3
    1967- 8' 11 & 3/4" 7 & 1/3
Model C First One # 2,485 Made In 1859-1869 7' 1" 7 Octaves
(Old Style 3)   1870-1884 7' 2" 7 & 1/3
    1884-1906 7' 3 &1/2" 7 & 1/3
    1885-1936 7' 5" 7 & 1/3
  Last Ones # 163,XXX 1913 7' 5" 7 & 1/3
 
Model B First One # 24,000 Made In 1872-1884 6' 8" 7 Octaves
(Old Style 2)   1884-1892 6' 10 &1/2" 7
    1891-1913 6' 10 &1/2" 7 & 1/3
    1914-1917 6' 11 &1/2" 7 & 1/3
    1918-1966 6' 11" 7 & 1/3
    1967- 6' 10 & 1/2" 7 & 1/3
 
Model A First One # 38,887 (Round Tail) Made in 1878-1893 6' 0" 7 Octaves
Model A I   1892-1897 6' 0" 7 & 1/3
Model A II # 86,XXX (Square Tail) 1896-1914 6' 0" 7 & 1/3
Model A III First One # 163,442 Made in 1913 6' 4 &1/2" 7 & 1/3
  Last Ones # 318,XXX 1947 6' 4 &1/2" 7 & 1/3
 
Model O First One # 96,766 Made in 1900-1913 5' 10" 7 & 1/3
    1914-1924 5' 10 & 1/2" 7 & 1/3
  Last Ones # 221,XXX 1923 5' 10 & 1/2" 7 & 1/3
 
Model L First One # 219,684 Made in 1923- 5' 10 & 1/2" 7 & 1/3
 
Model M First One # 149,500 Made in 1911 5' 6" 7 & 1/3
    1914 5' 6 &3/4" 7 & 1/3
    1918- 5' 7" 7 & 1/3
 
Model S Baby Grand Piano First One # 280,900 Made In 1935- 5' 1" 7 & 1/3

Grand Player Pianos  Note:  Steinway sold the piano to Aeolian Co. who installed the Duo Art Mechanism

Model XR Was 6' 2" (Model M plus 7")
Model OR Was 6' 5" (Model O or L plus 6 & 1/2")
Model AR Was 6' 11 &1/2" (Model A III plus 7")

Uprights

  First One # 5,451 Made in 1862   7 Octaves
  Last Ones # 270,XXX Made in 1934   7
Model E   1869 to 1872 4' 0" 7
(Style 1)   1872 to 1892 3' 10" 7 & 1/3
    1892 to 1898 4' 2" 7 & 1/3
Model V   1913 to 1934 4' 1" 7 & 1/3
Models F & O (also L, R, H, X, and T)   1869 to 1884 4' 4" 7 & 1/3
(Style 2)   1884 to 1898 4' 5 & 1/2" 7 & 1/3
Model I   1989 to 1914 4' 6 & 1/2" 7 & 1/3
    1914 to 1923 4' 6" 7 & 1/3
Model N   1900 to 1912 4' 4" 7 & 1/3
Model K   1903 to 1914 4' 2" 7 & 1/3
    1914 to 1929 4' 3 & 1/2" 7 & 1/3
Model G (Also S, P, Q, M, K, and T)   1874 to 1884 4' 8" 7 & 1/3
(Style 3)   1884 to 1898 4' 8 & 3/4" 7 & 1/3

Verticals  (All have 7 & 1/3 Octaves)

Model 45   (P) Pianino First One Serial  # 291,575 Made in 1938
  Modern Sk. 1051 297,678 1939 to 1941
  Louis XV Sk 1056 297,660 1939 to 1941
Model 40   First One 297,092 Made in 1939
  Sheraton Sk1057 297,092 1939 to 1946
  Colonial Sk1052 297,094 1940 to 1941
  Queen Ann Sk 1062 301,597 1940 to 1941
  Chippendale Sk 1063 301,652 1940 to 1941
  Louis XV Sk 1072 302,754 1940 to 1941
  Modern Sk 1051 303,657 1940 to 1941
  Hepplewhite Sk 1073 304,314 1940
  Regency Sk 1071 308,572 1941
  Early American Sk 1075 308,929 1941
  Georgian Sk 1077 321,875 1947 to 1948
  Louis XV Sk 1082 326,227 1949
Steinway Serial Numbers represent the approximate ending serial number for the year of production for New York and Hamburg pianos. 
Please Note: Serial numbers for some early production may span more than one year.
 
  Year Serial No.   Year Serial No.   Year Serial No.  
  1856
1858
1860
1861
1863
1864
1865
1866
1867
1869
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1881
1883
1886
1887
1889
1891
1893
1894
1896
1898
1900
1901
1902
1904
1905
1906
1907
1908
1909
1910
1911
1911
1912
1913
1914
1915
1916
1917
1918
1000
2000
3000
5000
7000
9000
11000
13000
15000
17000
19000
21000
23000
25000
27000
29000
31000
33000
35000
40000
45000
50000
55000
60000
65000
70000
75000
80000
85000
90000
95000
100000
105000
110000
115000
120000
125000
130000
135000
140000
145000
150000
155000
160000
165000
170000
175000
180000
190000
  1919
1920
1921
1922
1923
1923
1924
1925
1925
1926
1927
1927
1928
1929
1930
1931
1932
1932
1933
1933
1934
1935
1936
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
195000
200000
205000
210000
215000
220000
225000
230000
235000
240000
250000
255000
260000
265000
270000
271000
273000
274000
275000
276000
278000
279000
281000
284000
289000
290000
294000
300000
305000
310000
314000
316000
317000
319000
322000
324000
328000
331000
334000
337000
340000
343000
346500
350000
355000
358000
362000
366000
370000
  1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
375000
380000
385000
390000
395000
400000
405000
412000
418000
423000
426000
431000
436000
439000
445000
450000
455300
463000
468500
473500
478500
483000
488000
493000
498000
503000
507700
512600
516600
520300
523500
527000
530000
533500
537200
540700
545000
549000
554000
558000
562500
567000
571000
574500
578500
582500
584600
587500
589500
 

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